Unveiling the complexity of strigolactones: exploring structural diversity, biosynthesis pathways, and signaling mechanisms.
J Exp Bot
; 75(4): 1134-1147, 2024 Feb 12.
Article
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| MEDLINE
| ID: mdl-37877933
ABSTRACT
Strigolactone is the collective name for compounds containing a butenolide as a part of their structure, first discovered as compounds that induce seed germination of root parasitic plants. They were later found to be rhizosphere signaling molecules that induce hyphal branching of arbuscular mycorrhizal fungi, and, finally, they emerged as a class of plant hormones. Strigolactones are found in root exudates, where they display a great variability in their chemical structure. Their structure varies among plant species, and multiple strigolactones can exist in one species. Over 30 strigolactones have been identified, yet the chemical structure of the strigolactone that functions as an endogenous hormone and is found in the above-ground parts of plants remains unknown. We discuss our current knowledge of the synthetic pathways of diverse strigolactones and their regulation, as well as recent progress in identifying strigolactones as plant hormones. Strigolactone is perceived by the DWARF14 (D14), receptor, an α/ß hydrolase which originated by gene duplication of KARRIKIN INSENSITIVE 2 (KAI2). D14 and KAI2 signaling pathways are partially overlapping paralogous pathways. Progress in understanding the signaling mechanisms mediated by two α/ß hydrolase receptors as well as remaining challenges in the field of strigolactone research are reviewed.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Reguladores del Crecimiento de las Plantas
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Micorrizas
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Compuestos Heterocíclicos con 3 Anillos
Idioma:
En
Revista:
J Exp Bot
Asunto de la revista:
BOTANICA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Japón